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Finding the Fourth Proportional to 143,498.61, 198,028.08 and 79,836.39

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Solution

The fourth proportional to 143,498.61, 198,028.08 and 79,836.39 is: 110,174.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,498.61 : 198,028.08 = 79,836.39 : x
  2. Step 2: Convert to fraction form
    143,498.61/198,028.08 = 79,836.39/x
  3. Step 3: Cross multiply
    143,498.61x = 198,028.08 × 79,836.39
  4. Step 4: Simplify right side
    143,498.61x = 15,809,847,025.83
  5. Step 5: Solve for x
    x = 15,809,847,025.83/143,498.61
  6. Step 6: Final answer
    x = 110,174.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.